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Understanding how multiple muscles are recruited across a joint has typically been approached from relating muscle activity to resultant forces. New tools are now available to look deeper into a muscle's recruitment by observing groups of single motor units. Identifying changes in the motor unit activity both within a muscle and between muscles the redundancies in motor control can be better understood...
This work addresses an efficient and highly reliable Noise-Vibration-Harshness simulation and analysis framework for electrical induction drives in E-mobility applications. Based on a combined nonlinear analytic and Finite-Element modeling structure in spatial frequency space the entire operational Noise-Vibration-Harshness-simulation is embedded in one simulation environment and can be performed...
In this study, a method realizing real-time color-tunable white light-emitting diodes (LEDs) through the combination of phosphor patterns and adaptive liquid lens is proposed. The phosphor patterns with red ring and yellow ring was fabricated on an Indium Tin Oxides glass (ITO glass) plate by the screen printing process. The ITO glass is set to be the electrode to change the lens shape. And a liquid...
Self-aligned flip-chip assembly with sub-micron accuracy is of particular importance to low-cost manufacturing of single-mode opto-electronic components. The concept of alignment via surface tension force of melted solder has been proposed over two decades ago and appears simple. Yet, its effective working into manufacturing requires solving a few fundamental issues. In prior work, we introduced the...
Many components used in the aerospace industry are complex shaped components, without symmetric axes and parallel surfaces. During fabrication and repair, these components require fixing for processes such as drilling, surface finishing, inspections and assembly operations in terms of locating, holding or supporting. The pin type fixturing system is the predominant design used in such applications...
Hardness is among the most important attributes of an object that humans learn about through touch. However, approaches for robots to estimate hardness are limited, due to the lack of information provided by current tactile sensors. In this work, we address these limitations by introducing a novel method for hardness estimation, based on the GelSight tactile sensor, and the method does not require...
We present the design, modeling, and implementation of a novel pneumatic actuator, the Pneumatic Reel Actuator (PRA). The PRA is highly extensible, lightweight, capable of operating in compression and tension, compliant, and inexpensive. An initial prototype of the PRA can reach extension ratios greater than 16:1, has a force-to-weight ratio over 28:1, reach speeds of 0.87 meters per second, and can...
Autonomous delivery of goods using a Micro Air Vehicle (MAV) is a difficult problem, as it poses high demand on the MAV's control, perception and manipulation capabilities. This problem is especially challenging if the exact shape, location and configuration of the objects are unknown. In this paper, we report our findings during the development and evaluation of a fully integrated system that is...
During the last decades, optoelectronic tweezers (OET), which combines flexibility of optical tweezers (OT) with locally large electrokinetic force generated by dielectrophoresis (DEP), plays an important role in manipulating and assembling biological cells. Since classic Pohl's expression as effective dipole moment is simple and understandable form, many non-spherical cells such as erythrocyte and...
This paper introduces a new kind of geometric graph, called the degree-sensitive neighbourhood graph (dNNG), for a more precise modelling of neighbourhoods. Based on dNNG, we define better shape-based metrics and then propose a neighbourhood-driven force-directed algorithm, called NEFO, for neighbourhood faithfulness. Our evaluation on both real-world and randomly generated graphs shows that the dNNG...
The different of Ag-11Au-4.5Pd and Ag-11Au-4.5Pd-0.1Y alloy bonding wire mechanical properties, fusing current and structure were analyzed by strength tester, electronic conductivity tester, and scanning electron microscope. The effects of Y on Ag-11Au-4.5Pd and Ag-11Au-4.5Pd-0.1Y alloy bonding wire ball size, bonded micro phonology and bonded strength were investigated. The results show that the...
In this paper, a Linear Flux-Switching Permanent Magnet Machine (LFSPMM) and Rotating six-phases Flux-Switching Permanent Magnet Machine (RFSPMM) are modeled and compared using FEM. The results from these models are discussed and compared with measurements, regarding shape and amplitude of the resulting back-EMF waveforms. Furthermore, by using current decoupling control algorithm, the second order...
The paper deals with an approach to design the pole shape of inset permanent magnet fractional-slot tubular-linear synchronous machines (IPM T-LSMs). The study is initiated by a 2D finite element analysis (FEA)-based investigation of the effects of the pole-shaping on the machine no-load features. Such investigation is carried out while varying a single geometrical parameter: that is the angle characterizing...
We have developed a grinding motion control technology for an automatic finishing process by newly constructing a feedforward driving-type end-effector module attached to a multi-axis industrial arm. Metal products formed by pressurized filling methods, such as vacuum or die casting processes, often have physical penetration defects on the product surface. However, the manufacture of products with...
We present a method to estimate the frequency shift of parasitic modes in MEMS gyroscopes with respect to the displacement of the drive mode. Our method is based on static FE simulations in ANSYS and thus it is computationally efficient and very fast. The method correctly reproduces the measurements of a benchmark MEMS structure.
The double-sided slotted permanent magnet synchronous linear motor (PMSLM) has the advantages of high thrust density and high power factor. This paper adopted the structure of tooth-shifted double sides and obtained the influence law on thrust characteristic under different tooth-shifted distance by using finite element simulation. It also compared tooth-shifting and pole-shifting. Combining the orthogonal...
Many applications are limited by the performance of the motors that power them. In the small power range, slotless BLDC motors are commonly used due to their intrinsic high power density and smooth torque characteristic. However, recent work has shown that the power density of radial flux rotating motors could be significantly increased by replacing their windings, made of copper wire by windings...
This paper presents the modeling of Transversal Artificial Muscles. The innovative construction enables transversal deformation of the muscle, what allows obtaining a linear displacement by changing a diameter of a muscle without changing its length. The model simulates the motion of a PAM caused by a force which depended on pressure and deformation. Theoretically predicted capacities, like generated...
We report a hybrid film that is composed of “polymer nanosheet” with a hundreds-of-nanometer-thick film and “punched film” with hundreds-of-micrometer-thick film. Because of the thickness, the nanosheet is able to adhere to biological tissues without a glue, but is sometimes difficult to handling. Our hybrid film is established both adhesiveness of the nanosheet and shape-controlling ability of the...
In this study, a novel “micro-macro” planer MEMS tactile sensor integrating two different scales of tactile sensors has been developed for artificial realization of human's fingertip feeling. The “micro-scale” tactile sensor detects “micro surface shape” and “micro-area frictional force” that are generated and detected at a fingerprint on human's fingertip skin. On the other hand, the integrated “macro-scale”...
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